/Engine/Source/Runtime/MovieSceneTracks/Public/Sections/MovieSceneAudioSection.h
The attach component given the bound actor and the actor attach key with the component and socket names
[USceneComponent](API\Runtime\Engine\Components\USceneComponent) * GetAttachComponent ( const [AActor](API\Runtime\Engine\GameFramework\AActor) * InParentActor, const [FMovieSceneActorReferenceKey](API\Runtime\MovieSceneTracks\Sections\FMovieSceneActorReferenceKey) & Key ) const